What is Snow Tubing?
Excerpt from http://en.wikipedia.org/wiki/Tubing_(recreation) Tubing on snow is a wintertime activity that is similar to sledding. This kind of tubing is almost always performed on a hill or slope, using gravity to propel the rider to the bottom of the grade. The rider often returns to the top of the slope with the tube to repeat the process. The low amount of friction between most tubes and snow allows tubers to reach considerable speeds while riding, especially on steep slopes. Because of the circular shape of snow tubes, controlling the course and speed of a tube while riding on snow is extremely difficult. While a sled rider can drag their arms on the snow to brake or steer to a degree, attempting this on a tube will often cause the tube to spin. This lack of control has led to injuries, some serious, when riders have struck obstacles such as trees while tubing on snow. Some ski resorts offer courses devoted solely to tubing. Such courses often have slopes or barriers on the periph
